Prevent crashing the login page

This fix will check if the user is loggued into the backend
before trying to edit the Administration page html.
version bump + release notes
Merge pull request #50 from DeuxHuitHuit/patch-3

Prevent crashing the login page
Fix inconsistent behavior

@andrewminton found out that on some setup, `$form[0]` would not be
set. Somehow, the first item in the array was at key = 1

So this fix uses php's current method to get the firt item in the array.
Merge pull request #54 from DeuxHuitHuit/patch-3

Fix inconsistent behavior
Update extension.meta.xml
Merge pull request #55 from symphonists/integration

Release Version 2.1.3